Feature:1. Maintain the ductility of the copper pipe during the expansion process to avoid cracks and leakage.2. Mainly used to expand copper pipes, to make two copper pipes tightly connected when installing air condition.3. Made of bearing steel material, with high elastic limit and contact fatigue strength, it is not easy to be deformed after longterm use.4. Hex handle design, it is not easy to fall off when installed on a hand tool, and the operation is safer.5. There are a total of 6 different sizes of expanders, suitable for the expansion of different airconditioning copper pipe diameters.Specification:Item Type: Tube ExpanderMaterial: Bearing steelSurface Treatment: BlackeningSpecifications: 7/8in (approx. 22.2mm / 0.9in), 3/4in (approx. 19mm / 0.75in), 5/8in (approx. 15.9mm / 0.6in), 1/2in (approx. 12.7mm / 0.5in), 3/8in (approx. 9.5mm / 0.4in), 1/4in (approx. 6.3mm / 0.25in).Package List:6 x Tube Expander